sdynpy.core.sdynpy_data.frf_from_time_data

• Module: sdynpy.core.sdynpy_data

• Source: GitHub

Signature¶

def sdynpy.core.sdynpy_data.frf_from_time_data(reference_data: sdynpy.core.sdynpy_data.TimeHistoryArray, response_data: sdynpy.core.sdynpy_data.TimeHistoryArray, samples_per_average: int = None, overlap: float = 0.0, method: str = 'H1', window=array([1.]), return_model_data=False, **timedata2frf_kwargs)

Computes a transfer function from reference and response time histories

Parameters¶

• reference_data : TimeHistoryArray Time data to be used as a reference

• response_data : TimeHistoryArray Time data to be used as responses

• samples_per_average : int, optional Number of samples used to split up the signals into averages. The default is None, meaning the data is treated as a single measurement frame.

• overlap : float, optional The overlap as a fraction of the frame (e.g. 0.5 specifies 50% overlap). The default is 0.0, meaning no overlap is used.

• method : str, optional The method for creating the frequency response function. ‘H1’ is default if not specified. samples_per_average, overlap, and window are not used if method==‘LRM’.

• window : np.ndarray or str, optional A 1D ndarray with length samples_per_average that specifies the coefficients of the window. No window is applied if not specified. If a string is specified, then the window will be obtained from scipy.

• **timedata2frf_kwargs : various Additional keyword arguments that may be passed into the timedata2frf function in sdynpy.frf. If method==‘LRM’, see also frf_local_model in sdynpy.lrm for more options.

Returns¶

• TransferFunctionArray

• A transfer function array computed from the specified references and

• responses.

Raises¶

• ValueError

• Raised if reference and response functions do not have consistent

• abscissa